{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "201563",
    "entityType": "User",
    "nonce": "0x9c545deeb9ed1acbe9fc2324e35497c1cee18d90e0304cb3210902c3d0372af2",
    "signature": "0x0b0990c3dbf386af1200f4ac7b0fe7091ee6047ea1e3fe62a698b2658484b80b65ad394cf8aede4d2a1e58ad4e664ca985ffdb4f08b72f4c8a75e93089ff5fa31b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}